Method and system for delivering message in storage system

A system for delivering a message in a storage system, comprising:

• one or more processors;
• a memory coupled to at least one processor of the one or more processors;
• computer program instructions stored in the memory which, when executed by the at least one processor, cause the system to execute a method for delivering a message in the storage system, the storage system comprising a first controller, a second controller, a first communication area and a second communication area and the method comprising:
• in response to receiving a message that is to be delivered from the first controller to the second controller, writing the message to the first communication area that is readable and writable to the first controller and readable to the second controller;
• and
• writing an address identifier to the second communication area, the address identifier being used for indicating an address at which the second controller reads the message from the first communication area, the second communication area being readable to the first controller and readable and writable to the second controller.